An application does not create an instance of the IColumnMapping interface directly, but creates an instance of a class that inherits IColumnMapping.

Classes that inherit IColumnMapping must implement all inherited members, and typically define additional members to add provider-specific functionality. For example, the IColumnMapping interface defines the DataSetColumn property. In turn, the DataColumnMapping class inherits this property, and also defines the GetDataColumnBySchemaAction method.

Notes to Implementers

When you inherit from the IColumnMapping interface, you should implement the following constructors:

Item

Description

ColumnMapping()

Initializes a new instance of the ColumnMapping class.

ColumnMapping(string sourceColumn, string dataSetColumn)

Initializes a new instance of the ColumnMapping class with a source with the specified source column name and DataSet column name.

The following example creates an instance of the derived class, DataColumnMapping, and adds it to a DataColumnMappingCollection collection. It then tells the user that the mapping was added to the collection and shows the parent for the mapping.